THE MOON GOES THROUGH A COMPLETE ORBIT EVERY 27 DAYS ? WHY DOES THIS HAPPEN?

Answer:

= 0.28M

Explanation:

data:

volume = 0.250 L

           = 0.250dm^3                       ( 1litre = 1dm^3)

moles = 0.70 moles

Solution:

      molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]

                 = 0.70 / 0.250

    molarity = 0.28 M

[tex]3.9 ~\text{kcal} = 3.9 \times 1000 ~ \text{cal} = 3900~ \text{cal.}[/tex]

Answer:

The salt bridge serves to complete the electrical circuit in the galvanic cell. It is pertinent that the salt bridge ions are in high concentrations as this allows electron mobility and keeps each half cell electronically neutral. The diluted salt bridge wuld cause a buildup of positive charge in the anode and negative charge in the cathode and the electrode half reactions which either reduce or oxidise species would halt. Causing the cell to stop producing electronic energy, impedeing the proper functioning of the galvanic cell.

Answer:

"cis" (Latin for Side)

Answer:

nice

Explanation:

you can do it just try your best

The number of micrograms of contaminant each person will receive is 5,742.64 ug.

The number of micrograms of contaminant each person will receive is calculated as follows;

Amount of contaminant (mg) = (1.01 x 10⁻⁴ mg/mL) x 2.28 x 10⁴ L

Amount of contaminant (mg) = 2.3028 mg.L/mL

Amount of contaminant (mg) = (2.3028 mg.L/mL) x (1000 mL/L) = 2,302.8 mg

Amount of contaminant (ug) = 2,302.8 mg x 1000 ug/mg = 2,302,800 ug

=  (2,302,800 ug) / (401 persons)

= 5,742.64 ug per person

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Answer:

The hydrogen ion concentration in a solution, [H+], in mol L-1, can be calculated if the pH of the solution is known.

pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L-1 pH = -log10[H+] ...

[H+] in mol L-1 can be calculated using the equation (formula): [H+] = 10-pH

Answer:

KCL

Explanation:

is more soluble in 100grams of H2O at 70 degrees Celsius?

Answer:

The strong force binds quarks together in clusters to make more-familiar subatomic particles, such as protons and neutrons. It also holds together the atomic nucleus and underlies interactions between all particles containing quarks.

The statement, that describe an isomer of a compound with an empirical formula of C₄H₁₀O₃ is "CHO."

The empirical formula of an organic compounds is the lowest whole number ratio of atoms contained in the substance, as defined in chemistry. The empirical formula gives the minimal ratio of the number of various atoms that existing. It's an empirical formula, if the formula is shortened, whereas not the exact number of atoms in the molecule, The given isomer of a compound is C₄H₁₀O₃. For this isomer, CHO is the empirical formula.

Hence, the correct answer is CHO.

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Answer:

0.500

Explanation:

We presume your "centroid ratio theorem" tells you that AG = 2·DG, so ...

 (x+7) = 2(x -15)

 x + 7 = 2x - 30 . . . . eliminate parentheses

 37 = x  . . . . . . . . . . .add 30-x

Then AG = 37+7 = 44

and DG = 37-15 = 22.

Of course, AD = AG +GD = 44 +22 = 66

Answer:

Acid

Explanation:

The given structure is that of formaldehyde.

Formaldehyde is a weak acid (pH = 3.5 / 3).

______

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Answer:

an  alternative fuel is any automotive fuel other than gasoline and diesel fuel

Explanation:

Answer:

Kinetic energy

Explanation:

Gravitational potential energy changes into kinetic energy. The equation for gravitational potential energy is GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on Earth), and h is the height above the ground in meters

The increasing order of the freezing point of the compounds are 0.10 M ethanol <  0.10 M CaCl2 < 0.10 M MgSO4​.

The freezing points of ethanol, calcium chloride and magnesium sulfate is determined as follows;

Thus, the increasing order of the freezing point of the compounds are as follows;

0.10 M ethanol <  0.10 M CaCl2 < 0.10 M MgSO4​.

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It is expected at 1.05 atm the solubility increases if compared to the solubility at 0.222 atm.

In general, an increase in pressure leads to an increase in solubility. In the same way, a decrease in pressure will decrease solubility.

Considering the pressure increased, the most likely result is for the solubility to proportinally increase.

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Answer:

Titration reveals that 12 mL of 1.5 M hydrochloric acid are required to neutralize 25 mL calcium hydroxide solution . What is the molarity of the Ca(OH) 2 solution

Explanation:

Answer: The pull of the moon's gravity on Earth's water causes tidal bulges to form on the side closest to the moon and farthest from the moon. In the place where there are tidal bulges, high tide occurs along coastline.

Explanation:

All metal nitrates are soluble in water, how are you going to do that?

But just for a theoretical exercise:

2AgNO3(aq) + Cu^2+(aq) >>>> 2Ag+(aq) + Cu(NO3)2

2 moles of silver nitrate produce 1 mole of copper nitrate.

Therefore 3 moles would produce 3/2 moles of copper nitrate.

Explanation:

The composition of the stack gas are :

[tex]CH_4[/tex]= 0.8713

[tex]C_3H_8[/tex] = 0.0202

CO = 0.107

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of [tex]CH_4[/tex] : 70% of 100 g = 70 g

Mass of [tex]C_3H_8[/tex] : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of [tex]CH_4[/tex] : [tex]\frac{70 g}{16.04 g/mol}[/tex] = 4.3 mole

Number of moles of [tex]C_3H_8[/tex]: [tex]\frac{15 g}{144.1 g/mol}[/tex] = 0.10 mole

Mass of CO : [tex]\frac{15 g}{28.01 g/mol}[/tex] = 0.53 mole

Now to calculate the mole fraction of each we use the formula:

Mole fraction of [tex]CH_4[/tex]: [tex]\frac{4.3}{4.935}[/tex] = 0.8713

Mole fraction of [tex]C_3H_8[/tex] : [tex]\frac{0.10}{4.935}[/tex] = 0.0202

Mole fraction of CO : [tex]\frac{0.53}{4.935}[/tex] = 0.107

Hence, composition of the stack gas are:

[tex]CH_4[/tex] = 0.8713

[tex]C_3H_8[/tex] = 0.0202

CO = 0.107

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3 moles of I2 will be formed from 3 moles of chrlorine gas.

Explanation:

This is because, when you balance the given equation it allows for the mole ratio between the two given elements to be 1:1 so therefore 3 moles of chlorine gas will produce 3 moles of I2.

Answer:

29/43

Explanation:because of the numbers

Answer:

an element.

Explanation:

When all the atoms contain a nucleus with the same amount of protons then each atom is classified as the same element. Hence multiple atoms and a larger quantity of atoms of the same element is still just the same single element.

Answer:

Elements that occupy the same column on the periodic table

Answer:

[Ne] 3s² 3p³

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Answer:

Here, is the number of moles in the CO2. Substitute 0.20 g for weight and 44 g/mol for molecular weight of the CO2.

1 mol = 6.02.10²³ particles (atoms, molecules, ions)

mol CO₂ = 0.2 g : 44 g/mol = 0.0045

molecules = 0.0045 x 6.02 x 10²³ = 2.709 x 10²¹